Question

What happens when CO2 gas is passed through lime water and why does it disappear on passing excess co2?

Answer 1

caco3 is formed on excess co2 passing it dissolves

Answer 2

Answer:

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Explanation:

When CO2 is passed through lime water,it

turns milky due to the formation of calcium

carbonate which is insoluble in water.

(limewater)Ca(OH)2+CO2⟶(milkiness)CaCO3+

H2O

However, when excess of CO2 is passed

through this solution, the milkiness

disappears. This is due to the formation of

calcium bicarbonate which is colorless and

soluble in water.

(milkiness)CaCO3+H2O(excess)+CO2 ->

Ca(HCO3)2

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